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Did you exercise before or since? Have you noticed any difference in performance?

Do you live in an area with a lot of sunshine in a low enough latitude or take vit D supplements before?

Yes to both. Exercise generally helps. Yes to vitamin D (there’s a great long vitamin PDF on COVID for like $15). Yes to sunshine. Trying to walk with a mask daily.

Honestly the base hypothesis is that it’s the societal change, and not the n=1 study.

You're walking outside with a mask? How much mask wearing are you doing? A mask isn't going to help your energy levels at all, and you don't need to use them, especially if you had it already. Try losing the masks for a few months except when forced and see if it helps?

Isn't lung damage one possibility? I imagine that it could both eventually heal and be visible on an x ray if that's the case?

I'm only speculating based on some articles I've read.

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